92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
/*
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* Copyright 2008-2022 Max Kellermann <max.kellermann@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "Headers.hxx"
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#include <curl/curl.h>
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#include <cstddef>
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#include <exception>
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#include <string_view>
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class CurlEasy;
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class CurlResponseHandler;
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class CurlResponseHandlerAdapter {
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CURL *curl;
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CurlResponseHandler &handler;
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Curl::Headers headers;
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/**
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* An exception caught from within the WriteFunction() which
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* will later be handled by Done().
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*/
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std::exception_ptr postponed_error;
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/** error message provided by libcurl */
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char error_buffer[CURL_ERROR_SIZE];
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enum class State {
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UNINITIALISED,
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HEADERS,
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BODY,
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CLOSED,
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} state = State::UNINITIALISED;
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public:
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explicit CurlResponseHandlerAdapter(CurlResponseHandler &_handler) noexcept
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:handler(_handler) {}
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void Install(CurlEasy &easy);
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void Done(CURLcode result) noexcept;
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private:
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void FinishHeaders();
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void FinishBody();
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void HeaderFunction(std::string_view s) noexcept;
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/** called by curl when a new header is available */
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static std::size_t _HeaderFunction(char *ptr,
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std::size_t size, std::size_t nmemb,
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void *stream) noexcept;
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std::size_t DataReceived(const void *ptr, std::size_t size) noexcept;
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/** called by curl when new data is available */
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static std::size_t WriteFunction(char *ptr,
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std::size_t size, std::size_t nmemb,
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void *stream) noexcept;
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};
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